CHM 101 Lecture Notes - Lecture 1: Decimal Mark, Salad, Scale Of Temperature
Document Summary
Matter: anything that occupies space and has mass. Chemistry: the study of matter and its changes. Physical & chemical properties of matter: sec 1. 4. Physical property: measure and observe without changing the composition or identity of the substance. Chemical property: any chemical reaction that a substance can undergo, compound cannot be restored without a chemical change. Si base units of measurement: international system of units (si. Celsius and kelvin have scales of equal magnitude: Question: mercury, the only metal that exists as a liquid at room temperature, melts at -38. 9 c. Precision: ability to get the same measurement multiple times. Expresses a number as a product of a number between 1 and 10 and the appropriate power of 10: 125. Move decimal seven places to the left, so we multiply 9. 3 by 10 seven time. When the decimal point is moved to the left, the exponent is positive, lip:
